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Seamless elbow
Seamless elbow

    Seamless elbow

    Seamless elbow is a kind of pipe fitting used for pipe bend...


Seamless elbow is a kind of pipe fitting used for pipe bend. The proportion of all pipe fittings used in the pipe system is large, about 80%. Generally, different forming processes are used for the bending of different materials. At present. The seamless elbow forming process commonly used by manufacturers includes hot push, stamping and extrusion.

Seamless elbow forming method

1. Forging and pressing method: the end of pipe or part of pipe is blanked with the die forging machine to reduce the outside diameter. The common die forging machine has rotary type, connecting rod type and roller type.

2. Rolling method: generally without mandrel, it is suitable for inner circular edge of thick wall pipe. A core is placed inside the pipe, and the outer rim is pushed and pressed with a roller for circular edge machining.

3. Stamping method: the pipe end is expanded to the required size and shape with a cone on the press.

4. Bending forming method: there are three methods commonly used, one is stretch method, the other is stamping method, and the third is roller method. There are 3-4 rollers, two fixed rollers, one adjustment roller, and adjustment of fixed roll distance.

5. Swelling method: one method is to place rubber inside the pipe, which is compressed with a punch to make the pipe protruding into shape; Another method is hydraulic bulging forming. Liquid is poured into the middle of the pipe. The liquid pressure makes the pipe into the required shape.

Seamless elbow advantage

Seamless elbow has the following advantages: safe and sound, light weight, good heat resistance, corrosion resistance, thermal insulation, anti-shock performance, long service life

1. Hygienic and harmless: the material is completely composed of carbon and hydrogen, without adding any toxic heavy metal salt stabilizer. The hygiene performance of the material has been tested by authorities.

2. Light weight: the density of stamping elbow is 0.89-0.91g/cm, which is only one-tenth of that of steel pipe. As a result of light weight, can greatly reduce the cost of transportation and installation of construction intensity.

3. Good heat resistance: when the working temperature is 70 degrees, the softening temperature is 140 degrees.

4. Good corrosion resistance: with the exception of a few hydrogenation agents, it can resist the erosion of various chemical media, and has excellent acid, alkali resistance, corrosion resistance, rust resistance, corrosion resistance, bacteria breeding and electrochemical corrosion resistance.

5. High impact resistance: as the unique impact strength performance is significantly improved compared with other solid wall tubes, the ring stiffness is equivalent to 1.3 times of the solid wall.

6. Long service life: under rated service temperature and pressure, the service life of the pipe can reach more than 50 years, and it can prevent ultraviolet and radiation, so that the product will not fade.



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